okay first thoughts: please provide a link to the exact vnv package (don't mean to be pedantic but I just honestly don't know exactly which one you mean).
Is this the paid-for one that everyone was complaining about?
You are on a Kindle Touch, *hacked to the core*, it would be good to know if you have any well-known "Gotcha" software installed - Like I dunno Optware or something that always messes stuff up. (as-in better off listing your hacks installed and any little "special" changes you made if any exist)
My instinct (given the place that it is rebooting, I am tracing back through dmesg to see what boots when) would be to attempt to trigger the uninstall via dumping it to the root of the /mnt/us
Whether that will get picked up or you will have to issue command to instigate that process I am not sure.
You say you can access the USB drive. All of it? or just that FAT bit.
as-in is SSH working?
All that info would REALLY help even begin to suggest some actions.
Whether it is me - or someone with more brain cells - who helps you they will most likely want/need that info.
Cheers
One more thought...
Just wait and let it reboot about 20 times. I have had software cause this too.
These are the kind of things I imagine are going on during "Those times"
So yeah. make sure it is on charge and let it go mental for a bit. see if it sorts it. If you already did that well. meh. worth a try...